F22 reboot issues

[Stephen Davies]

Since updating to F22 I have had issues with system restarts.
Regardless of how I restart (reboot or systemctl) the process stops at the 
point where the log says "Reached target Shutdown" and just hangs.
I have to press the physical restart button to get the system up again.

The first thing that happens when I request the reboot is that I get a message
"GDBus.Error:org.freedesktop.DBus.Error.LimitsExceeded Maximum number of 
connections for UID 0 has been reached".

When the system does restart, I get a pop-up saying that Thunderbird is 
already running.
I have to manually kill the tbird process and then reinitialise tbird.
To my knowledge, there is nothing in a startup script to initiate tbird.

Cheers and thanks,
Stephen